Cooling internal-combustion engines.



I COATALEN.

COOLING INTERNAL COMBUSTION ENGINES.

APPLICATION FILED MAY 23. 19:1.

1,299, 1 29. Patented Apr. 1,1919.

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Male" UNITED STATES PATENT OFFICE.

LOUIS GOATALEN, OF WOLVERHAMPTON, ENGLAND, ASSIGNOR OF ONE-HALF TO ISUNBEAM MOTOR CAR COMPANY LIMITED, OF WOLVERHAMPTON, ENGLAND.

Specification of Letters Patent.

Application filed May 23, 1917. Serial No. 170,540.

To all whom it may concern."

Be it known that I, LOUIS COATALEN, a subject of the King of England,residin in Wolverhampton, Stafford'shire, Englan have invented certainnew and useful Improvements in Cooling Internal-Combustion Engines, ofwhich the following is a specification.

This invention has for its object to improve the cooling of the interiorof internal combustion engines, particularly such as are used onaeroplanes and the like. It has previously been proposed to pass airthrough the crank chamber, and it is the object of this invention toprovide a system of this kind for engines having a cam shaft arrangedabove the cylinder.

According to this invention, air is admitted at the end of the crankchamber opposite to that at which the cam shaft drive I is arranged andthe air passing along the crank chamber is then caused to travel up thecam shaft gear casing preferably after having passed through acentrifugal separator or filter. Thus the oil picked up by the airpassing along the crank chamber is .not carried up the cam shaft gearcasing. At the top of the casing there are provided one or more outlets,preferably with a cowl or ventilator projecting in the oppositedirection to the air draft.

The accompanying drawing shows in side elevation more or lessdiagrammatically a four cylinder engine provided with a reducin earthrou h which the propeller is drlven and to w applied. I

The crank chamber is indicated at A and this contains a longitudinalcrank shaft supich this invention has been ported in bearings in anysuitable manner.

The cylinders are indicated at B and inside a casing C is a cam shaftthe axis of which is indicated at D. This cam shaft is driven by gearingof any suitable kind located in the casing E and driven from the crankshaft, the axis of which is at F. The crank shaft also drives through areducing gear on to the propeller shaft G the reducing gear beinglocated in the housing H. This housing is provided with an air funnel Jcausing air to pass in the direction of the arrows downward into thecrank case. Further, the

Patented Apr.1, 1919.

propeller shaft G may be hollow and air may enter this in the directionof the arrows and if desired the crank chamber may be provided with oneor more air inlets K.

-The air entering in this manner travels along the crank chamber, up thecasing E, and out through the outlet funnel L. At the bottom of thecasing E may be a filter or filters of any suitable kind, or some knownform of centrifugal separator may be used A to separate the particles ofoil from the air.

Alternatively the filters or filtering devices What I to secure byLetters Patent is claim as my invention and desire 1. In an internalcombustion engine for use in aerial machines, a crank casing havingholes therein, a casing projecting upwardly from sa1d crank casing andcontaining the gear driving the overhead cam shaft and means for causingair to pass through the holes and out through the top of the upwardlyprojecting casing.

2. In an internal combustion engine for use in aerial machines, a crankshaft, propeller driven by the crank shaft, a casing for the crankshaft, an air funnel on the casing in proximity to the propeller, anoverhead cam shaft, a casing projecting upwardly from the crank casingand containing the gear for driving the overhead cam shaft and at theopposite end of the crank casing to the propeller and a funnel on thegear casing, for the purpose described.

3. In an internal combustion engine for use in aerial machines, a crankshaft, 21. propeller driven by the crank shaft, a hollow propellershaft, a casing for the crank shaft, an air funnel on the casing inproximity to the propeller, an overhead cam shaft, a casing projectingupwardly from the crank casing and containing the gear for driving theoverhead cam shaft and at the opposite end of the crank casing to thepropeller and a funnel on the gear casing, for the purpose described.

4. In an internal combustion engine for of the gear casing and a funnelon the gear use in aerial machines, a crank shaft, a procasing, for thepurpose described. peller driven by the crank shaft, a casing for Intestimony whereof I have signed my the crank shaft, an air funnel on thecasing name to this specification in the presence of 5 in proximity tothe propeller, an overhead two subscribing Witnesses.

cam shaft, a casing projecting npwardly from the crank casing andcontaining the LOUIS COATALEN' gear for driving the overhead cam shaftand Witnesses: at the opposite end of the crank casing to C. W. JONES,

10 the propeller, an oil separator at the bottom L. V. 002mm.

